2301 A Review : The Potential of Powder Metallurgy in Recycling Aluminum Chips (Al 6061&Al 7075)

Abstract

Aluminium products are becoming popular and the demand is increasing because of its special properties such as excellent corrosion resistance with good strength, recyclable and low density compared to stecl. CurrentlM two methods used to recycle aluminium chips are conventional and direct conversion methods. Recycling ofaluminium chips by the direct conversion methods is relatively simple, censumed less energy and do not harm thc cnvironment.The cost of recycled materials is much lewer than the cost of primary alurniniurn production by conventional technique. This paper reviews the recycling technologies ofaluminium chips using powder meta11urgy technique. Kewerds: aruminium chip, aluminium recycling, solid state recycling, conventional recycling, direct recycling, powdermetallurgy

Sustainable Solid Waste Recycling

“…Different percentages of fine polyethylene waste are used to produce plastic cement. The ranges of polyethylene used are 15,20,25,30,35,40, 50, 60 and 80% of the mixing materials with fixed water content of 25% [10].…”

“…These chips are accumulated in the workshops and factories which need to be removed and remelted to cast as a useful part. The traditional recycling process becomes costly because it is required by a high number of employees and consumed high energy as well as generated high emission and pollution which are the main challenging task worldwide [19,20].…”

“…Therefore, it's very important to develop an efficient recycling process that prevents generation of chips again. For that reason, sustainable policy becomes the focus for modern industrial societies to reduce the usage of primary resource, pollution control and prevention [19][20][21].…”

“…However, non-conventional recycling process was done by extrusion and sintering process, which leads to save 95% of energy that was consumed in conventional recycling process and can reduce solid waste disposal, and CO 2 emission as well. Direct conversion method is one of the non-conventional recycling methods that are relatively simple, economic, and environmental-friendly process, which can be considered as a sustainable manufacturing process [19][20][21][22][23][24].…”

The Effect of Microstructures and Hardness Characteristics of Recycling Aluminium Chip AA6061/Al Powder On Various Sintering Temperatures

“…Recycling aluminium uses about 5% to 15% of the energy required to create aluminium from bauxite; the amount of energy required to convert aluminium oxide into an aluminium can be vividly seen the process is reversed during the combustion of termite [6][7].…”